<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      var money = prompt("输入分数");

      if (money >= 90) {
        alert("A");
      } else if (money >= 80) {A
        alert("B");
      } else if (money >= 70) {
        alert("C");
      } else if (money >= 60) {
        alert("D");
      } else {
        alert("E");
      }
    </script>
  </body>
</html>
